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3 years ago

The network of glands that release chemical messengers directly into the bloodstream is called the ________.

1 answer:

4 0

The network of glands that release chemical messengers directly into the bloodstream is called the endocrine system. The endocrine system produces and secretes these chemical messengers, referred as hormones directly into bloodstream to transmit signals to appropriate part of body. The hormones regulate bodily functions like growth, metabolism, tissue function, sexual function, reproduction, sleep and mood.

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Estimate the maximum time a person could listen to a sound of 87 decibels.

Kazeer [188]

The maximum time a person could listen to a sound of 87 decibels is: 8 hours

<h3>Meaning of Decibels</h3>

Decibels can be defined as the unit used by scientists to measure sound level.The values of Decibel ranges from a very low value to a very high value and the higher we get the more dangerous it is to our human ear.

In conclusion, The maximum time a person could listen to a sound of 87 decibels is 8 hours

Learn more about Decibels and human hearing : brainly.com/question/1291668

#SPJ1

4 0

2 years ago

Different microbes grow in a wide variety of environmental conditions; however, most have preferences for certain temperatures,

lesya692 [45]

Answer:

this is a TRUE statement.

Explanation:

Different microbes grow in a wide variety of environmental conditions; however, most have preferences for certain temperatures, pH, and atmospheric gases because although microbes are widespread in their occurrence,they are found almost everywhere,in the air,water,soil,food,decaying matter,oil deposits,in plants etc.

but their number and their types vary according to the locality and environmental conditions.

Although, some microbes are always present and contribute towards natural flora BUT besides this others are present in specific environments such as some in hot springs bearing very HIGH TEMPERATURE RANGES for example: Thermus aquaticus.

some of them inhabit the acidic or alkaline soil feeding on HUMUS.

Most of the microbes prefer ATMOSPHERIC GASES i.e some require oxygen for their survival .For example: Pseudomonas.

some don't require O2 for survival i.e Spirochete.

IN SHORT, most of the microbes have preferences for various environmental conditions.

5 0

3 years ago

How does Mycobacterium tuberculosis replicate?

morpeh [17]

Answer:

mycobacterium tuberculosis that has to complete successive cycle of transmission,infection and disease

5 0

3 years ago

Which of the following is a true statement? a. Mammals were the prominent species just before the extinction of dinosaurs. b. Ma

Angelina_Jolie [31]

Answer:

The correct answer is B.

Explanation:

Option A is wrong. Mammals were not the prominent species before the extinction of dinosaurs because the mammal species that lived during the dinosaurs' era were so small that they only weighed several grams and occupied small areas as their habitats.

Option C is wrong. As dinosaurs became extinct, reptiles and "birds" remained as their descendant which evolved to some of the species that we know today.

Option D is wrong. Pangea started to break up to form the geographic isolation for the diversion of many species around 175 million years ago.

So the correct answer is B. Massive extinction disrupts and changes the food chain in such a big way that it triggers a domino effect that leads to species adapting to their new environment and diversifying thus forming new species in the process.

I hope this answer helps.

5 0

3 years ago

The presence of myelin allows an axon to

Reptile [31]

The presences of myelin allows an axon to conduct their signals rapidly

4 0

3 years ago